Holder for incandescent lamps



(No Model.)

T. W. BRYANT.

HOLDER FOR INOANDESOENT LAMPS.

Patented Jan. 6

NITED STATES ATENT ()FFICE.

THOMAS \V. BRYANT, OF ANSONIA, CONNECTICUT.

HOLDER FOR INCANDESCENT LAMPS.

DPECIFICATIOE forming part of Letters Patent No. 310,373, dated January6, 18

Applicatiun filed May .3, 1884. (X0 model.)

1'0 all whom it may concern:

ie it known that I, Tnoiims W. BRYANT, of Ansonia, in the county ofNewHaven and State of Connecticut, have invented a new Improvement inHolders for Incandescent Lamps; and I do hereby declare the following,when taken in connection with accompanying drawings and the letters ofreference mark ed thereon, to be a full, clear, and exact description ofthe same, and which said drawings constitute part of this specification,and represent, in

Figure 1, a side-view of theholder and lamp attached; Fig. 2,:tverticalcentral section; Fig. 3, an under side view of the head, showing theconnection between the wire from the upper end of the springs and theline-wires, all the figures enlarged.

This invention relates to an improvement in the construction of holdersfor incandescent lamps, the object being to make the lamp readilydetachable, yet insure perfect contact when in place; and the inventionconsists in the construction of the holder, as hereinafter fullydescribed, and more particularly recited inthe claims.

A is the metal socket by which the holder is secured; 13, the body ofthe holder, made of wood or other suitable material, and into which thetip of the socket is screwed or otherwise applied. The upper end of thebody is inclosed by a metal cap, C.

In the lower end of the body are two verti' cal recesses, a 7). Intoeach of these recesses ahelical spring, respectively, (1 c, isintroduced, the diameter of the spring being somewhat less than therecess, so as to leave perl'ect freedom of the spring. The wire from theupper end of each spring is continued upward through a hole leading fromthe respective recesses, thence returned through another hole to thebottom of the body, where the ends are secured, respectively, by screwsf g.

Centrally through the body is an opening, through which the twoline-wires h i extend. These run downward to the lower end of the body,and are turned and secured by the same screws, f g, which secure thewires of the respective springs, and thereby make contact between theline-wires and the springs. The

l the springs d c are tending to draw lower ends of the springs (Z c arebent to form hooks, respectively, Zm.

Upon the outside the body is reduced to form an annular shoulder, a. Around the body and against this shoulder a helical spring, 0, isarranged, free for vertical extension or contraction. Surrounding thisspring is a metallic shell, This shell extends up onto the outer surfaceof the cap C, as shown, and below the spring is contracted to form aninternal shoulder, 1', against which the lower end of the spring 0bears, and so that the tendency of the spriug-the upper end bearingagainst the shoulder a, and its lower end against the shoulder r-is toforce the shell 1) downward. The lower end of this shell is open andconstructed with downwardly-proj ecting and outwardly-curved fingers s,to embrace the neck of the lamp D. The lamp is constructed in the usualmanner, and consists of a small glass globe terminating in a neck at itsupper end, and through which the two wirest a pass, and within the globesupport the carbon. Thelamp itself, constituting no part of myinvention, therefore, does not require to be particularly described. Thetwo wires t a terminate, respectively, in hooks v w, and so as toengage, respectively, the hooks Zm at the lower end of the springs (Z c,as shown, and when engaged, as seen 'in Fig. 2, the shell 1) is forceddown by the action of the spring 0 tending to force the lamp downward,at the same time it upward, whereby a lirm metallic contact is madebetween the two wires at the respective hooks,

Z t and m in, and such a contact as cannot-be accidentally broken. Theshell 1) is free to slide up and down upon the cap C.

Through the shell 1) are one or more vertical slots, E, and throughthese slots a pin, F, is introduced into the body B, but so as to permitthe up and down movement of the shell The lower end of these slots isturned at right angles, as at G. Now, if the shell be moved upward sofar as to bring the right'an- 9 gular portion of the slot G into linewith the pin F, and the shell be turned to take the horizontal portion Gof the slot onto the pin, the shell will be held in that elevatedposition,'as seen in broken lines, Fig. 2, and in thus raising the shellthespring 0 is compressed. At'the same time the lamp itself is relievedfrom the downward pressure or permitting it to be raised, and so thatthe hooks l v and m to may be readily disengaged.

The fingers s embrace the neck of the lamp with sufficient frictionalforce to hold the lamp. Therefore when the shell 19 is raised it carriesthe lamp with it, and to such an extent that the hooks cw are raisedfrom substantial contact with the hooks Z m, and in which condition thecircuit is broken, and will so remain broken until the shell 1) beturned to bring the vertical portion E of the slot intoline with the pinF. Then the spring 0 will react, force the shell 2 downward, and with itthe lamp, to again make contact between the hooks Zn and m 10.

By this construction not only is positive con tact assured whenrequired, but that contact is easily broken by simply raising the shellpand locking it in its raised position. lVhen the shell is so raised thelamp may be easily removed by simply drawing it from the grasp of thefingers s s and disengaging the hooks, or replaced by reversing theoperation. It will be understood that the wires h t' are insulated, andthat the upward extension from the springs as it passes over the top ofthe body is insulated from the cap, either by ma terial introducedbetween the cap and the head over the bend in the wires, as shown, or0therwise.

WVhile I prefer to employ the spring 0 it may be omitted, the sleevebeing constructed to slide upon the body with sufficient friction tohold it in either position, up or down; or the slot E may be constructedwith a right-angular projection therefrom at its upper end, so that thesleeve may be turned to lock it either in its up or down position. Inthe omission of the spring 0, the forcible contact will be made by thesprings d c only. The spring 0 serves to make this contact more firm.

I am aware that springs have been arranged in incandescent lamps, oneend of each spring in connection with the respective wires of the forceof that spring,

shell, 1), helical spring 0, the said shell constructed at its lower endto embrace the neck a w of the globe, the lamp provided with the twohooks o w, in connection with the carbon in the lamp, and so as toengage the respective hooks Zm'of the holder, substantially asdescribed.

2. The combination of the body B, linewires extending downward throughthe body, the body constructed with recesses a b, helical springsarranged in said recesses, their upper end continued through the bodyand returned to the lower end and there connected with the line'wires,the lower end of the springs constructed to form hooks Z m, theverticallymovable shell 12, constructed at its lower end to'embrace theneck of the lamp, and the wires from the carbon in thelamp constructedto engage the said hooks I m, substantially as described.

3. The combination of the head B, helical springs d 0, one end of eachin connection with the respective line-wires, the other end constructedto engage the respective wires from the lamp, the vertically-movableshell 2, constructed at its lower end to embrace the neck of the lamp,and also constructed with the L-shaped slot E G, and the spring 0, allsubstantially as and for the purpose described.

THOS. V. BRYANT.

lVitncsses:

Jos. C. EARLE, J. H. SrIUnwaY.

